Accept set_route as model switch alias

crates/jcode-protocol/src/protocol_tests/misc_events.rs

@@ -195,6 +195,25 @@ fn test_set_feature_roundtrip() -> Result<()> {
     Ok(())
 }
 
+#[test]
+fn test_set_route_deserializes_as_set_model_compat_alias() -> Result<()> {
+    let decoded = parse_request_json(r#"{"type":"set_route","id":42,"model":"claude-opus-4-5"}"#)?;
+    let Request::SetModel { id, model } = decoded else {
+        return Err(anyhow!(
+            "expected set_route compatibility alias to decode as SetModel"
+        ));
+    };
+    assert_eq!(id, 42);
+    assert_eq!(model, "claude-opus-4-5");
+
+    let encoded = serde_json::to_string(&Request::SetModel {
+        id: 43,
+        model: "gpt-5.5".to_string(),
+    })?;
+    assert!(encoded.contains("\"type\":\"set_model\""));
+    Ok(())
+}
+
 #[test]
 fn test_subscribe_request_roundtrip_preserves_session_takeover_flags() -> Result<()> {
     let req = Request::Subscribe {

crates/jcode-protocol/src/wire.rs

@@ -159,8 +159,12 @@ pub enum Request {
     #[serde(rename = "refresh_models")]
     RefreshModels { id: u64 },
 
-    /// Set the active model by name
+    /// Set the active model by name.
+    ///
+    /// `set_route` is accepted as a legacy/desktop compatibility alias for
+    /// clients that briefly emitted route-oriented model switch requests.
     #[serde(rename = "set_model")]
+    #[serde(alias = "set_route")]
     SetModel { id: u64, model: String },
 
     /// Set or clear the session-scoped subagent model preference.